stuart



F. A. STUART.

Thrashing Machinq. No. 3,620. Patehted M85, 1844.

murnn STATES PATENT OFFICE.

FREDK. A. STUART, OF CATHARINE, NEW YORK.

THRESHING-MACI-IINE.

Specification of Letters Patent No. 3,620, dated June 5, 184.4.

To all "whom it may concern:

Be it known that I, FREDERICK A. STUART, of Catharine, in the county ofOhemung and State of New York, have invented a new and usefulImprovement in Machines for Separating Grain from Straw, which isdescribed as follows, reference being had to the annexed drawings of thesame, making part of this specification.

Figure 1 is a perspective view, Fig. 2 is a vertical transverse section.

The nature of this invention and improvement consists in inclining thecylinder and surrounding it with a tight case larger at one end than atthe other for confining the straw and grain while under the operation ofthe threshing cylinder having an opening in each end through which theaxle of the cylinder passes and an opening in one side into which thefeeding hopper is insorted and an opening in the opposite side for thedischarging spout.

The frame A spiked cylinder B and driving pulley C are made in the usualmanner, except that they are made to stand in an inclined position bymaking two of the legs of the frame shorter than the opposite pair nextthe driving pulley.

The case D D in which the cylinder revolves is made in two sections-thelower section D being somewhat more than a semicircle made smooth insideand provided on one side with a feeding hopper E and on the other sidewith a discharging spout F and flanges for securing it to the frame andof greater diameter than the cylinder revolving therein.

The cap or upper section D of said case which corresponds with and fitsover L116 edges of the lower sections is made larger at one end than atthe other. Its ends being made straight and smooth and its sidesstraight about one third its height the re maining portion is curvedas asection of a cylinder forming a concave space over the cylinder greaterat one end than at the cylinder through the feeding hopper and thecylinder being in rapid motion the straw is carried around it 1n asplral directlon 1n the case with great velocity until the grain iscompletely separated therefrom when the whole is discharged through thespout F at the lower or discharging end to be subjected to the action ofthe winnowing machine for cleaning the grain of the chaff, &c., which isperformed in the usual manner.

What I claim as my invention and which I desire to secure by LettersPatent is The before described mode of separating grain from straw bysubjecting it to the action of an inclined revolving cylinder of teethwithin a smooth case made larger at one end than at the other for thepurpose of allowing the straw and grain to have a spiral movementdownward and around the cylinder from the feeding toward the dischargingend by which it is subjected to the action of the revolving teeth atevery revolution of the cylinder without the danger of the machineclogging, and without the use of any concave of the ordinaryconstruction provided with teeth, said concave being constructed andarranged as before described.

FREDERICK A. STUART.

WVitnesses:

NVM. P. ELLIOT,

ALBERT E. JOHNSON.

